High-precision small sprue bush assembly

Abstract

The utility model provides a high-precision small sprue bush assembly, relates to the technical field of die-casting dies, and is characterized in that an inner cavity is formed in a sleeve, a sliding groove is formed in the inner wall of the inner cavity, a buffer mechanism is arranged on the inner wall of the sliding groove, the buffer mechanism comprises a base, a plurality of first rotating shafts are fixedly connected to the outer wall of the base, and a plurality of second rotating shafts are fixedly connected to the outer wall of the base. A rotating plate is rotatably connected to the outer wall of the first rotating shaft, a second rotating shaft is fixedly connected to the end, away from the first rotating shaft, of the rotating plate, and a connecting block is fixedly connected to the outer wall of the second rotating shaft. Through the arrangement of the clamping ring, primary alignment with an external injection molding head can be achieved, then the first sleeve and the second sleeve can be clamped along with stamping of the injection molding head, meanwhile, stamping of the injection molding head can be buffered through multiple sets of buffering mechanisms, the stability of subsequent alignment is effectively improved, the protection performance of the sprue bush is further improved, and the service life of the sprue bush is prolonged. Therefore, mechanical impact and abrasion are reduced, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting die technical field, concretely is a kind of high-precision small-sized sprue bush assembly. BACKGROUND

[0002] Sprue bush is also called as nipple, nozzle, sprue, is the runner component that let molten plastic material be injected from injection molding machine nozzle into mould inside, for connecting metal fittings of forming mould and injection molding machine.

[0003] The structure of sprue bush provided in the publication "CN217752553U" can be known, the patent technology can be split into two by setting the split disc one and the split disc two composed of circular outer ring, split screen and a plurality of mounting clamping seats, so that the molten plastic can be split during use, so that the internal bubbles are broken, so that the product internal bubbles during injection molding can be avoided to affect the yield, and the split disc one and the split disc two are convenient to install and disassemble.

[0004] But the above-mentioned device still has the following problems in the implementation process:

[0005] When the sprue bush structure is positioned during injection molding, rigid collision with the injection molding head is easy to occur, so that the structure is damaged or broken, and the damage can be in the form of crack, fracture, deformation and the like, thereby reducing the service life of the sprue bush. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of high-precision small-sized sprue bush assembly to solve the problems raised in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A kind of high-precision small-sized sprue bush assembly, the inner chamber is set in the inside of the sleeve, and the inner wall of the inner chamber is provided with a sliding slot, the inner wall of the sliding slot is provided with a buffer mechanism;

[0009] The buffer mechanism includes a base, and a plurality of first rotating shafts are fixedly connected to the outer wall of the base, and rotating plates are rotatably connected to the outer wall of the first rotating shafts, second rotating shafts are fixedly connected to the end of the rotating plates away from the first rotating shafts, connecting blocks are fixedly connected to the outer wall of the second rotating shafts, sliding blocks are fixedly connected to the top of the connecting blocks, connecting rods are slidably connected to the inside of the sliding blocks, sliding rings are fixedly connected to one end of the connecting rods, springs are fixedly connected to the end of the sliding rings close to the connecting rods, the end of the springs away from the sliding rings is fixedly connected to the side wall of the sliding block, and mounting holes are formed through the bottom of the base.

[0010] Preferably, the connecting rod is fixedly connected with the first sleeve at one end away from the sliding ring, and a clamping groove is formed in the outer wall of the first sleeve; the top of the base is fixedly connected with a second sleeve, and a clamping tooth is fixedly connected with the end of the second sleeve close to the first sleeve, and the outer wall of the clamping tooth is in sliding fit with the inner wall of the clamping groove.

[0011] Preferably, the top of the first sleeve is fixedly connected with a clamping ring, and a pouring inlet is formed in the center of the inner wall of the clamping ring.

[0012] Preferably, the top of the first sleeve is fixedly connected with a clamping ring, and a pouring inlet is formed in the center of the inner wall of the clamping ring.

[0013] Preferably, the top of the second sleeve is fixedly connected with a second through hole, and the inner wall of the second through hole corresponds to the inner wall of the first through hole and the inner wall of the mounting hole.

[0014] Preferably, the bottom of the inner cavity is threadedly connected with a connecting pipe, and a flow-through opening is formed in the inside of the connecting pipe.

[0015] Preferably, the bottom of the inner cavity is fixedly connected with a connecting pipe, and a flow-through opening is formed in the inside of the connecting pipe.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. When in use, the clamping ring can be preliminarily aligned with the external injection head, then the first sleeve and the second sleeve can be clamped as the injection head is punched, and the punching of the injection head can be buffered by the multiple buffering mechanisms, thereby effectively improving the stability of subsequent alignment and further improving the protection of the sprue bushing, so that mechanical impact and wear are reduced and the service life of the equipment is prolonged.

[0018] 2. The sleeve and the connecting pipe are threadedly connected, so that the installation or dismounting work is facilitated, the maintenance efficiency is improved, and the corresponding parts can be directly replaced after damage, thereby reducing the cost. ACCURACY

[0019] Figure 1 It is a whole structure schematic view of the utility model;

[0020] Figure 2 It is a whole structure sectional view of the utility model;

[0021] Figure 3 It is a buffering mechanism structure explosion view of the utility model;

[0022] Figure 4 It is a local structure schematic view of the utility model.

[0023] In the figure: 1, sleeve; 2, inner cavity; 3, sliding groove; 4, buffer mechanism; 401, base; 402, first rotating shaft; 403, rotating plate; 404, second rotating shaft; 405, connecting block; 406, sliding block; 407, connecting rod; 408, spring; 409, sliding ring; 410, mounting hole; 5, first sleeve; 6, second sleeve; 7, clamping groove; 8, clamping tooth; 9, first through hole; 10, second through hole; 11, clamping ring; 12, injection port; 13, connecting pipe; 14, flow-through port. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Embodiment one, please refer to Figures 1-4 The utility model provides a kind of high-precision small-sized sprue bush assembly, including the inside of sleeve 1 is equipped with inner cavity 2, and the inner wall of inner cavity 2 is equipped with sliding groove 3, the inner wall of sliding groove 3 is provided with buffer mechanism 4;

[0026] Further, buffer mechanism 4 includes base 401, and the outer wall of base 401 is fixedly connected with a plurality of first rotating shafts 402, and the outer wall of first rotating shaft 402 is rotatably connected with rotating plate 403, and the end, away from first rotating shaft 402, of rotating plate 403 is fixedly connected with second rotating shaft 404, and the outer wall of second rotating shaft 404 is fixedly connected with connecting block 405, and the top of connecting block 405 is fixedly connected with sliding block 406, and the inside of sliding block 406 is slidably connected with connecting rod 407, one end of connecting rod 407 is fixedly connected with sliding ring 409, and the end, close to connecting rod 407, of sliding ring 409 is fixedly connected with spring 408, and the end, away from sliding ring 409, of spring 408 is fixedly connected to the side wall of sliding block 406, and the bottom of base 401 is equipped with mounting hole 410;

[0027] In this embodiment, the sleeve 1 is threadedly connected with the connecting pipe 13, so that it can be conveniently installed in the mold. When it is used after installation, the injection head for stamping first contacts the clamping ring 11 to complete the initial alignment during the process. With the movement of the injection head, the center of the clamping ring 11 is aligned. Then the nozzle of the injection head is pressed and fitted with the inner wall of the injection port 12. After that, the clamping ring 11 is continuously extruded, and then the clamping ring 11 drives the first sleeve 5 to move downward. During the downward movement of the first sleeve 5, the slider 406 is moved. Then the slider 406 drives the sliding ring 409 to slide downward along the inner wall of the sliding groove 3. Since the base 401 is fixedly connected to the inner wall of the inner cavity 2, and the base 401 and the slider 406 are rotatably connected to the rotating plate 403, the slider 406 slides outward along the outer wall of the connecting rod 407 while being pressed downward, and at the same time, the spring 408 is compressed. The force generated by the compression of the plurality of springs 408 effectively buffers the stamping force of the injection head, avoiding direct rigid impact. Then the first sleeve 5 contacts the second sleeve 6, and then the clamping groove 7 is clamped with the clamping tooth 8. After clamping is completed, the first through hole 9 and the second through hole 10 are in close communication, and then the injection work can be performed.

[0028] In the second embodiment, the first sleeve 5 is fixedly connected to the end away from the sliding ring 409 of the connecting rod 407, and the outer wall of the first sleeve 5 is provided with a clamping groove 7. The second sleeve 6 is fixedly connected to the top of the base 401, and the end close to the first sleeve 5 of the second sleeve 6 is fixedly connected with the clamping tooth 8. The outer wall of the clamping tooth 8 is in close sliding fit with the inner wall of the clamping groove 7. The clamping ring 11 is fixedly connected to the top of the first sleeve 5, and the inner wall of the clamping ring 11 is provided with the injection port 12.

[0029] Further, the first sleeve 5 is provided with the first through hole 9 at the top thereof, and the inner wall of the first through hole 9 corresponds to the inner wall of the injection port 12. The second sleeve 6 is provided with the second through hole 10 at the top thereof, and the inner wall of the second through hole 10 corresponds to the inner wall of the first through hole 9. The inner wall of the second through hole 10 corresponds to the inner wall of the mounting hole 410.

[0030] In this embodiment, after the injection work is completed, the nozzle of the injection machine is retracted, and the spring 408 rebounds during the process, thereby driving the slider 406 to slide reversely along the outer wall of the connecting rod 407. Then the rotating plate 403 lifts the slider 406 upward, and then the slider 406 drives the first sleeve 5 to move through the connecting rod 407, thereby completing the reset.

[0031] Working principle: the stamping injection head in the process, first contact with the card ring 11 to complete the initial alignment, with the movement of the injection head, will be with the center position of card ring 11 alignment, then the nozzle of the injection head will be extruded with the inner wall of the inlet 12, then the card ring 11 will continue to extrude, then the card ring 11 will drive the first sleeve 5 to move down, in the process of the first sleeve 5 moving down, will drive the slider 406 to move, then the slider 406 will drive the sliding ring 409 along the inner wall of the sliding groove 3 to slide down, because the base 401 is fixedly connected to the inner wall of the inner cavity 2, the base 401 and the slider 406 are rotatably connected with the rotating plate 403, so the slider 406 will also slide outward along the outer wall of the connecting rod 407 at the same time of downward, at the same time, the spring 408 will be compressed, the force generated by the compression of the plurality of springs 408 will effectively buffer the stamping force of the injection head, avoid direct rigid collision, then the first sleeve 5 will contact the second sleeve 6, then the clamping slot 7 will continue to be clamped with the clamping tooth 8, after the clamping is completed, the first through hole 9 and the second through hole 10 will be in close communication, then the injection work can be carried out.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the changes, modifications, equivalents, substitutions and variations of the embodiments can be made by those skilled in the art without departing from the spirit and principles of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-precision small-sized nozzle bush assembly comprising a sleeve (1), characterized in that: The sleeve (1) is internally provided with an inner cavity (2), and the inner wall of the inner cavity (2) is provided with a sliding groove (3), and the inner wall of the sliding groove (3) is provided with a buffer mechanism (4). The buffer mechanism (4) comprises a base (401), and the outer wall of the base (401) is fixedly connected with a plurality of first rotating shafts (402), and the outer wall of the first rotating shaft (402) is rotatably connected with a rotating plate (403), and the end of the rotating plate (403) away from the first rotating shaft (402) is fixedly connected with a second rotating shaft (404), and the outer wall of the second rotating shaft (404) is fixedly connected with a connecting block (405), and the top of the connecting block (405) is fixedly connected with a sliding block (406), and the inside of the sliding block (406) is slidably connected with a connecting rod (407), one end of the connecting rod (407) is fixedly connected with a sliding ring (409), and the end of the sliding ring (409) close to the connecting rod (407) is fixedly connected with a spring (408), and the end of the spring (408) away from the sliding ring (409) is fixedly connected to the side wall of the sliding block (406), and the bottom of the base (401) is provided with a mounting hole (410).

2. A high-precision small-sized sprue bush assembly according to claim 1, characterized in that: The end of the connecting rod (407) away from the sliding ring (409) is fixedly connected with a first sleeve (5), and the outer wall of the first sleeve (5) is provided with a clamping groove (7), the top of the base (401) is fixedly connected with a second sleeve (6), and the end of the second sleeve (6) close to the first sleeve (5) is fixedly connected with a clamping tooth (8), and the outer wall of the clamping tooth (8) is slidably matched with the inner wall of the clamping groove (7).

3. A high-precision small-sized sprue bush assembly according to claim 2, characterized in that: The top of the first sleeve (5) is fixedly connected with a clamping ring (11), and the inner wall of the clamping ring (11) is provided with an injection port (12).

4. The high-precision small-sized sprue bush assembly according to claim 3, characterized in that: The top of the first sleeve (5) is provided with a first through hole (9), and the inner wall of the first through hole (9) corresponds to the inner wall of the injection port (12).

5. A high-precision small-sized sprue bush assembly according to claim 4, characterized in that: The top of the second sleeve (6) is provided with a second through hole (10), and the inner wall of the second through hole (10) corresponds to the inner wall of the first through hole (9), and the inner wall of the second through hole (10) corresponds to the inner wall of the mounting hole (410).

6. The high-precision small-sized sprue bush assembly according to claim 1, characterized in that: The bottom of the inner cavity (2) is threadedly connected with a connecting pipe (13), and the inside of the connecting pipe (13) is provided with a flow-through port (14).

7. A high-precision small-sized sprue bush assembly according to claim 6, characterized in that: The bottom of the inner cavity (2) is provided with a communication port, and the communication port is in communication with the inside of the base (401) and the inside of the flow-through port (14).

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